EP1785621B1 - Blade for a wind turbine - Google Patents

Blade for a wind turbine Download PDF

Info

Publication number
EP1785621B1
EP1785621B1 EP06021603.3A EP06021603A EP1785621B1 EP 1785621 B1 EP1785621 B1 EP 1785621B1 EP 06021603 A EP06021603 A EP 06021603A EP 1785621 B1 EP1785621 B1 EP 1785621B1
Authority
EP
European Patent Office
Prior art keywords
rotor blade
cavity
gas
pressure
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP06021603.3A
Other languages
German (de)
French (fr)
Other versions
EP1785621A3 (en
EP1785621A2 (en
Inventor
Matthias Stommel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daubner and Stommel GbR Bau Werk Planung
Original Assignee
Daubner and Stommel GbR Bau Werk Planung
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daubner and Stommel GbR Bau Werk Planung filed Critical Daubner and Stommel GbR Bau Werk Planung
Publication of EP1785621A2 publication Critical patent/EP1785621A2/en
Publication of EP1785621A3 publication Critical patent/EP1785621A3/en
Application granted granted Critical
Publication of EP1785621B1 publication Critical patent/EP1785621B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the present invention relates to a rotor blade for a wind power plant, wherein the rotor blade has at least one cavity. Furthermore, the invention relates to a method for operating a wind turbine with a rotor drivable rotor with at least one rotor blade of the aforementioned type, with a generator for converting the mechanical energy of the rotor into electrical energy and with a tower on which the rotor is arranged.
  • Rotor blades for wind turbines are exposed to high loads. Over the course of an assumed operating life of, for example, twenty years, the rotor blades rotate at least 300 to 500 million times. In particular, there are frequent bending load changes, which have a very negative effect on the life of the individual rotor blade.
  • rotor blades consist of a top and a bottom shell, wherein the shells are connected by transverse webs, which give the rotor blade sufficient bending stiffness.
  • the webs and the compounds of the webs with the upper and the lower shell - often adhesive bonds - are loaded in operation alternately to pressure and to train.
  • the publication DE 101 52 449 discloses a rotor blade whose surface is changeable. For this purpose, a dependent of the wind pressure with air fillable, separate container made of deformable material is provided. Interchangeable loads, as they arise during operation of the system, for example in the tower passages of the rotor blade, are not avoided.
  • the DE 195 28 862 A1 shows, cavities of a rotor blade to act on gas, namely with warm air. This gas is used to achieve de-icing of the rotor blade as needed. Weights will not be counteracted.
  • An inventive rotor blade for a wind turbine has at least one cavity which is gas-tight and is filled to bias the rotor blade with gas, in particular air, wherein the pressure of the gas should be greater or less than that at the installation of the wind turbine, i. the location of use of the rotor blade, usually expected average air pressure.
  • gas expressly includes gas mixtures.
  • the overpressure or the negative pressure prevailing in the cavity or within the rotor blade By the overpressure or the negative pressure prevailing in the cavity or within the rotor blade, a bias of the rotor blade is achieved with corresponding forces acting inwardly or outwardly, that is, operating loads are suppressed or coated as possible, so that it no longer in operation or only comes to low exchange rates.
  • the value of the positive or negative pressure which is preferably set, is naturally dependent on various influencing factors, such as the materials used of the rotor blade, the dimensions thereof and the like.
  • the cavity it is important that it is designed and arranged within the rotor blade in such a way that a prestressing of at least individual components of the rotor blade subjected to alternating load is achieved.
  • the entire rotor blade is formed in the usual way as a hollow body with upper and lower shell, wherein preferably in particular a outwardly bounded by the upper and lower shell, continuous cavity is formed.
  • the walls of the cavity can therefore be formed directly by the upper and lower shell.
  • transverse webs may be present, which connect the lower and upper shell with each other.
  • the value of the pressure of the gas in the cavity is preferably chosen so that it is at least outside the value interval, the lowest expected air pressure and the highest expected Air pressure value is specified. It is crucial to ensure that there is a bias of the rotor blade at the site, either by prevailing over- or under-pressure within the cavity.
  • the cavity of the rotor blade can be acted upon in the preparation of the same by means of a pressure source, in particular a compressor, or a vacuum source, in particular a pump with a corresponding, under overpressure or under negative pressure gas.
  • a pressure source in particular a compressor
  • a vacuum source in particular a pump
  • this is air into consideration.
  • inert gases in order to additionally prevent, for example, inside corrosion processes on the rotor blade.
  • one or more inlet and / or outlet openings are arranged in one or more walls delimiting the cavity, via which the gas can be introduced into the cavity from the outside and / or via which the gas is expelled from the cavity to the outside is conductive.
  • only one opening is present, which can serve as both an inlet and an outlet.
  • the rotor blade expediently has valves via which the inlet and / or outlet of the gas into or out of the cavity can be controlled.
  • the valves can also be arranged outside the rotor blade, for example inside the nacelle and / or at the pressure source or the negative pressure source. Corresponding inlets and / or outlets can lead to the inlet and / or outlet openings of the rotor blade.
  • a method for operating a wind turbine with a rotor blade of the type described above in which the actual pressure and / or the actual humidity and / or the actual temperature of the in the cavity is measured, wherein depending on the actual pressure and / or the actual humidity and / or the actual temperature of the pressure within the cavity is increased or decreased and / or the gas within the cavity at least partially, preferably is completely replaced.
  • This ensures that external temperature fluctuations in the environment of the wind energy plant, which lead to pressure fluctuations within the rotor blade cavity, can be compensated.
  • any moisture created within the cavity may be transported outside by replacing the gas with a new low-humidity gas should the humidity exceed a certain level.
  • the rotor blade For measuring the aforementioned actual values of the gas within the cavity, the rotor blade has a pressure sensor and / or a moisture sensor and / or a temperature sensor. Conveniently, these sensors are disposed within the cavity. At least they are in communication with the cavity.
  • a wind energy plant 10 is shown, which has at the upper end of a vertical, arranged on a horizontal surface 12 tower 14 a arranged on the tower top nacelle 16.
  • a wind energy plant 10 is shown, which has at the upper end of a vertical, arranged on a horizontal surface 12 tower 14 a arranged on the tower top nacelle 16.
  • the exact design of a tower of a wind turbine is diverse Embodiments conceivable.
  • the invention is not limited to the nature described in the drawing, frusto-conical shape of the tower 14.
  • a rotor 18 is arranged, which has a hub 20. Connected to the hub 20 are three rotor blades 22, wherein the rotor blade roots of the rotor blades 22 are inserted into corresponding openings of the hub 20 and connected in a known manner with this.
  • the rotor 18 rotates about an axis slightly inclined relative to the horizontal. As soon as wind hits the rotor blades 22, the rotor 18 together with the rotor blades 22 is set in rotation about the rotor axis. The movement of the rotor axis is converted into electrical current by a generator arranged inside the nacelle. The rotor blades 22 sweep a circular area during rotation. About an unillustrated, but known to those skilled in the art, adjusting the rotor blades 22 can be changed individually in their position relative to the wind, that is, the angle of attack of the rotor blades 22 to the wind is adjustable.
  • the basic structure of the wind power plant 10 with at least approximately horizontal rotor axis is known in the prior art, so that is dispensed with a detailed illustration of the same.
  • Each rotor blade 22 consists of a particular in the FIGS. 2 and 3 to be recognized lower shell 24 and an upper shell 26, which are connected to each other in the longitudinal direction of the rotor blade 22.
  • the materials of the lower shell 24 and the upper shell 26 and the compounds thereof are formed such that in the interior of the rotor blade 22, that is, of the lower shell 24 and the upper shell 26 enclosed cavity 28, gas-tight, in particular airtight is closed by the ambient air ,
  • each rotor blade 22 Inside the nacelle 16 is a compressed air source, not shown, namely, a compressor arranged. Via unillustrated lines, the compressor is connected to each rotor blade 22.
  • each rotor blade 22 has an inlet and an outlet opening in the region of the root. The respective inlet opening is connected to the compressor via corresponding lines, the respective outlet opening is connected via a controllable valve and corresponding lines with the ambient air.
  • each rotor blade 22 can be filled separately with compressed air until an overpressure exists.
  • the generation of overpressure in the rotor blade 22 therefore does not have to take place during production of the rotor blade 22, but may be carried out if this is already integrated into the wind energy plant 10.
  • the controllable via a valve outlet opening makes it possible to create a pressure equalization with the ambient air, ie, a pressure reduction. As a result, the pressure inside the rotor blade 22 can be reduced to a desired size, the lowest possible value corresponding to the ambient air pressure.
  • each sensors are arranged, which measure the humidity, the temperature and the pressure within the cavity 28.
  • the compressor is turned on by means of a corresponding control device and the pressure within the rotor blade 22 in question increases to a predetermined desired value. If the actual pressure in the cavity 28 rises above a predetermined maximum value due to high outside temperatures in the area of the wind turbine 10, the outlet valve can be opened so that compressed air can escape from the cavity 28 until a decrease of the pressure to the predetermined desired value is done.
  • the air inside the rotor blade 22 can be replaced by drier air by means of the compressor and the inlet and outlet openings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Description

Die vorliegende Erfindung betrifft ein Rotorblatt für eine Windenergieanlage, wobei das Rotorblatt zumindest einen Hohlraum aufweist. Des Weiteren betrifft die Erfindung ein Verfahren zum Betreiben einer Windenergieanlage mit einem von Wind antreibbaren Rotor mit zumindest einem Rotorblatt der vorgenannten Art, mit einem Generator zur Umwandlung der mechanischen Energie des Rotors in elektrische Energie sowie mit einem Turm, an dem der Rotor angeordnet ist.The present invention relates to a rotor blade for a wind power plant, wherein the rotor blade has at least one cavity. Furthermore, the invention relates to a method for operating a wind turbine with a rotor drivable rotor with at least one rotor blade of the aforementioned type, with a generator for converting the mechanical energy of the rotor into electrical energy and with a tower on which the rotor is arranged.

Rotorblätter für Windenergieanlagen sind großen Belastungen ausgesetzt. Im Laufe einer angenommenen Betriebsdauer von beispielsweise zwanzig Jahren drehen sich die Rotorblätter mindestens 300 bis 500 Millionen mal. Dabei kommt es insbesondere zu häufigen Biegewechselbelastungen, die sich äußerst negativ auf die Lebensdauer des einzelnen Rotorblattes auswirken. Üblicherweise bestehen Rotorblätter aus einer Ober-und einer Unterschale, wobei die Schalen durch Querstege verbunden sind, die dem Rotorblatt eine ausreichende Biegesteifheit verleihen. Insbesondere die Stege sowie die Verbindungen der Stege mit der Ober- bzw. der Unterschale - häufig Klebverbindungen - werden im Betrieb abwechselnd auf Druck und auf Zug belastet.Rotor blades for wind turbines are exposed to high loads. Over the course of an assumed operating life of, for example, twenty years, the rotor blades rotate at least 300 to 500 million times. In particular, there are frequent bending load changes, which have a very negative effect on the life of the individual rotor blade. Usually rotor blades consist of a top and a bottom shell, wherein the shells are connected by transverse webs, which give the rotor blade sufficient bending stiffness. In particular, the webs and the compounds of the webs with the upper and the lower shell - often adhesive bonds - are loaded in operation alternately to pressure and to train.

Die Druckschrift DE 101 52 449 offenbart ein Rotorblatt, dessen Oberfläche veränderbar ist. Dazu ist ein abhängig vom Winddruck mit Luft füllbarer, separater Behälter aus verformbaren Material vorgesehen. Wechsellasten, wie sie während des Betriebs der Anlage beispielsweise bei den Turmdurchgängen des Rotorblattes entstehen, werden so nicht vermieden.The publication DE 101 52 449 discloses a rotor blade whose surface is changeable. For this purpose, a dependent of the wind pressure with air fillable, separate container made of deformable material is provided. Interchangeable loads, as they arise during operation of the system, for example in the tower passages of the rotor blade, are not avoided.

Die DE 195 28 862 A1 zeigt, Hohlräume eines Rotorblattes mit Gas zu beaufschlagen, nämlich mit warmer Luft. Dieses Gas dient dazu, bedarfsweise eine Enteisung des Rotorblattes zu erreichen. Wechsellasten wird nicht entgegengewirkt.The DE 195 28 862 A1 shows, cavities of a rotor blade to act on gas, namely with warm air. This gas is used to achieve de-icing of the rotor blade as needed. Weights will not be counteracted.

Ausgehend von diesem Stand der Technik ist es Aufgabe der vorliegenden Erfindung, ein Rotorblatt der eingangs genannten Art für eine Windenergieanlage anzugeben, bei dem Wechsellasten gegenüber den im Stand der Technik eingesetzten Rotorblättern verringert oder möglichst verhindert werden. Des Weiteren ist es Aufgabe der vorliegenden Erfindung, ein Verfahren zum Betreiben einer Windenergieanlage der eingangs genannten Art anzugeben, bei der ein derartiges Rotorblatt eingesetzt wird.Based on this prior art, it is an object of the present invention to provide a rotor blade of the type mentioned for a wind turbine, are reduced in the exchange rates compared to the rotor blades used in the prior art or prevented as possible. Furthermore, it is an object of the present invention to provide a method for operating a wind turbine of the type mentioned, in which such a rotor blade is used.

Diese Aufgabe wird gelöst durch die Merkmale des Anspruches 1.This object is achieved by the features of claim 1.

Ein erfindungsgemäßes Rotorblatt für eine Windenergieanlage weist dabei zumindest einen Hohlraum auf, der gasdicht abgeschlossen ist und zur Vorspannung des Rotorblattes mit Gas, insbesondere Luft, gefüllt ist, wobei der Druck des Gases größer oder geringer sein soll als der an dem Aufstellort der Windenenergieanlage, d.h. dem Einsatzort des Rotorblattes, gewöhnlich zu erwartende, durchschnittliche Luftdruck. Im Rahmen dieser Anmeldung umfasst der Begriff Gas ausdrücklich Gasgemische.An inventive rotor blade for a wind turbine has at least one cavity which is gas-tight and is filled to bias the rotor blade with gas, in particular air, wherein the pressure of the gas should be greater or less than that at the installation of the wind turbine, i. the location of use of the rotor blade, usually expected average air pressure. In the context of this application, the term gas expressly includes gas mixtures.

Durch den Überdruck beziehungsweise den Unterdruck, der in dem Hohlraum bzw. innerhalb des Rotorblatts herrscht, wird eine Vorspannung des Rotorblatts mit entsprechenden nach Innen oder Außen wirkenden Kräften erzielt, das heißt, Betriebslasten werden möglichst überdrückt oder überzogen, so dass es im Betrieb nicht mehr oder nur noch zu geringen Wechsellasten kommt. Der Wert des Über- oder Unterdruckes, der bevorzugt eingestellt wird, ist dabei naturgemäß abhängig von verschiedenen Einflussfaktoren, wie etwa den eingesetzten Materialien des Rotorblattes, den Dimensionen desselben und dergleichen. Was den Hohlraum betrifft, so ist wichtig, dass er so ausgebildet und innerhalb des Rotorblattes angeordnet ist, dass eine Vorspannung zumindest einzelner, insbesondere einer Wechsellast unterworfener Bauteile des Rotorblattes erreicht wird.By the overpressure or the negative pressure prevailing in the cavity or within the rotor blade, a bias of the rotor blade is achieved with corresponding forces acting inwardly or outwardly, that is, operating loads are suppressed or coated as possible, so that it no longer in operation or only comes to low exchange rates. The value of the positive or negative pressure, which is preferably set, is naturally dependent on various influencing factors, such as the materials used of the rotor blade, the dimensions thereof and the like. As far as the cavity is concerned, it is important that it is designed and arranged within the rotor blade in such a way that a prestressing of at least individual components of the rotor blade subjected to alternating load is achieved.

In einer bevorzugten Ausführungsform ist das gesamte Rotorblatt in üblicher Weise als Hohlkörper ausgebildet mit Ober- und Unterschale, wobei vorzugsweise insbesondere ein nach außen durch die Ober- und Unterschale begrenzter, zusammenhängender Hohlraum gebildet ist. Die Wandungen des Hohlraums können demnach unmittelbar durch die Ober- und Unterschale gebildet werden. Innerhalb dieses Hohlraumes können Querstege vorhanden sind, die die Unter- und Oberschale miteinander verbinden. Wie der Fachmann des Standes der Technik erkennt, ist eine Vielzahl von anderen Ausführungsformen denkbar, bei denen ein oder mehrere erfindungsgemäße, gasdichte sowie gasgefüllte Hohlräume gebildet wird.In a preferred embodiment, the entire rotor blade is formed in the usual way as a hollow body with upper and lower shell, wherein preferably in particular a outwardly bounded by the upper and lower shell, continuous cavity is formed. The walls of the cavity can therefore be formed directly by the upper and lower shell. Within this cavity transverse webs may be present, which connect the lower and upper shell with each other. As the person skilled in the art recognizes, a large number of other embodiments are conceivable in which one or more gas-tight and gas-filled cavities according to the invention are formed.

Sollte der an dem Einsatzort des Rotorblattes zu erwartende Luftdruck je nach Wetterlage stark unterschiedlich sein, so wird der Wert des Drucks des im Hohlraum befindlichen Gases vorzugsweise so gewählt, dass er zumindest außerhalb des Werteintervalls liegt, das durch niedrigsten zu erwartenden Luftdruckwert und den höchsten zu erwartenden Luftdruckwert vorgegeben ist. Entscheidend ist, sicherzustellen, dass am Einsatzort eine Vorspannung des Rotorblattes vorliegt, entweder durch innerhalb des Hohlraums vorherrschenden Über- oder Unterdruck.If the expected at the place of use of the rotor blade air pressure depending on the weather conditions vary greatly, the value of the pressure of the gas in the cavity is preferably chosen so that it is at least outside the value interval, the lowest expected air pressure and the highest expected Air pressure value is specified. It is crucial to ensure that there is a bias of the rotor blade at the site, either by prevailing over- or under-pressure within the cavity.

Vorteilhafterweise kann der Hohlraum des Rotorblattes bereits bei der Herstellung desselben mittels einer Druckquelle, insbesondere einem Kompressor, oder einer Unterdruckquelle, insbesondere einer Pumpe, mit einem entsprechenden, unter Überdruck bzw. unter Unterdruck stehendem Gas beaufschlagt werden. Zweckmäßigerweise kommt hierfür Luft in Betracht. Es kann allerdings auch vorgesehen sein, inerte Gase einzusetzen, um zusätzlich beispielsweise innenseitigen Korrosionsvorgängen an dem Rotorblatt vorzubeugen.Advantageously, the cavity of the rotor blade can be acted upon in the preparation of the same by means of a pressure source, in particular a compressor, or a vacuum source, in particular a pump with a corresponding, under overpressure or under negative pressure gas. Conveniently, this is air into consideration. However, it can also be provided to use inert gases in order to additionally prevent, for example, inside corrosion processes on the rotor blade.

In einer bevorzugten Ausführungsform der vorliegenden Erfindung sind in einer oder mehreren den Hohlraum begrenzenden Wandungen eine oder mehrere Ein- und/oder Auslassöffnungen angeordnet, über die das Gas von außen in den Hohlraum einleitbar ist und/oder über die das Gas aus dem Hohlraum nach außen leitbar ist. In einer einfachen Ausführungsform ist nur eine Öffnung vorhanden, die sowohl als Ein- als auch als Auslass dienen kann. Zweckmäßig ist es allerdings, mindestens zwei Öffnungen vorzusehen, nämlich jeweils getrennte Ein- und Auslassöffnungen.In a preferred embodiment of the present invention, one or more inlet and / or outlet openings are arranged in one or more walls delimiting the cavity, via which the gas can be introduced into the cavity from the outside and / or via which the gas is expelled from the cavity to the outside is conductive. In a simple embodiment, only one opening is present, which can serve as both an inlet and an outlet. However, it is expedient to provide at least two openings, namely in each case separate inlet and outlet openings.

Mit derartigen Ein- und/oder Auslassöffnungen kann der Hohlraum des Rotorblatts im Betrieb, das heißt, wenn das Rotorblatt an einem Rotor einer Windenergieanlage angeordnet ist, mit - insbesondere zusätzlichem - Gas befüllt werden oder es kann Gas ausgelassen werden, um den Druck in dem Hohlraum zu erhöhen bzw. zu emiedrigen. Zweckmäßigerweise weist dazu das Rotorblatt Ventile auf, über die der Einlass- und/oder Auslass des Gases in oder aus dem Hohlraum steuerbar ist. Grundsätzlich können die Ventile auch außerhalb des Rotorblattes angeordnet sein, beispielsweise innerhalb der Gondel und/oder an der Druckquelle bzw. der Unterdruckquelle. Entsprechende Zu- und/oder Ableitungen können zu den Ein- und/oder Auslassöffnungen des Rotorblattes hinführen.With such inlet and / or outlet openings of the cavity of the rotor blade during operation, that is, when the rotor blade is disposed on a rotor of a wind turbine, - are filled with gas - in particular additional - gas or gas can be omitted to the pressure in the To increase or decrease the cavity. For this purpose, the rotor blade expediently has valves via which the inlet and / or outlet of the gas into or out of the cavity can be controlled. In principle, the valves can also be arranged outside the rotor blade, for example inside the nacelle and / or at the pressure source or the negative pressure source. Corresponding inlets and / or outlets can lead to the inlet and / or outlet openings of the rotor blade.

Gemäß einem eigenständigen Aspekt der vorliegenden Erfindung entsprechend Patentanspruch 12 wird ein Verfahren zum Betreiben einer Windenergieanlage mit einem Rotorblatt der oben beschriebenen Art angegeben, bei dem der Ist-Druck und/oder die Ist-Feuchtigkeit und/oder die Ist-Temperatur des in dem Hohlraum des Rotorblattes befindlichen Gases gemessen wird, wobei abhängig von dem Ist-Druck und/oder der Ist-Feuchtigkeit und/oder der Ist-Temperatur der Druck innerhalb des Hohlraums erhöht oder erniedrigt wird und/oder das Gas innerhalb des Hohlraumes zumindest teilweise, vorzugsweise vollständig ausgetauscht wird. Damit wird gewährleistet, dass äußere Temperaturschwankungen in der Umgebung der Windenergieanlage, die zu Druckschwankungen innerhalb des Rotorblatthohlraumes führen, ausgeglichen werden können. Zusätzlich kann eventuell innerhalb des Hohlraumes entstehende Feuchtigkeit nach außen transportiert werden, indem das Gas, sollte die Feuchtigkeit einen bestimmten Wert übersteigen, durch neues Gas geringerer Feuchtigkeit ausgetauscht wird.According to an independent aspect of the present invention according to claim 12, a method for operating a wind turbine with a rotor blade of the type described above is given, in which the actual pressure and / or the actual humidity and / or the actual temperature of the in the cavity is measured, wherein depending on the actual pressure and / or the actual humidity and / or the actual temperature of the pressure within the cavity is increased or decreased and / or the gas within the cavity at least partially, preferably is completely replaced. This ensures that external temperature fluctuations in the environment of the wind energy plant, which lead to pressure fluctuations within the rotor blade cavity, can be compensated. In addition, any moisture created within the cavity may be transported outside by replacing the gas with a new low-humidity gas should the humidity exceed a certain level.

Eine Windenergieanlage, die gemäß diesem Verfahren arbeitet, weist eine Regelungseinrichtung auf, die die Druckquelle und/oder die Unterdruckquelle abhängig von den entsprechenden Ist-Werten des Gases innerhalb des Hohlraumes regelt. Die Druckquelle und/oder die Unterdruckquelle ist dabei in einer bevorzugten Ausführungsform außerhalb des Rotorblattes angeordnet, beispielsweise innerhalb des Turms der Windenergieanlage oder innerhalb der Gondel.A wind turbine operating according to this method has a control device which regulates the pressure source and / or the vacuum source depending on the corresponding actual values of the gas within the cavity. The pressure source and / or the vacuum source is arranged in a preferred embodiment outside of the rotor blade, for example within the tower of the wind turbine or within the nacelle.

Zur Messung der vorgenannten Ist-Werte des Gases innerhalb des Hohlraumes weist das Rotorblatt einen Drucksensor und/oder einen Feuchtigkeitssensor und/oder einen Temperatursensor auf. Zweckmäßigerweise sind diese Sensoren innerhalb des Hohlraumes angeordnet. Zumindest stehen sie aber in kommunizierender Verbindung mit dem Hohlraum.For measuring the aforementioned actual values of the gas within the cavity, the rotor blade has a pressure sensor and / or a moisture sensor and / or a temperature sensor. Conveniently, these sensors are disposed within the cavity. At least they are in communication with the cavity.

Weitere Merkmale der vorliegenden Erfindung ergeben sich aus den beigefügten Ansprüchen, der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels sowie aus den beigefügten Zeichnungen. Darin zeigen:

Fig. 1
eine Seitenansicht der Windenergieanlage mit erfindungsgemäßem Rotorblatt,
Fig. 2
einen Querschnitt durch ein erfindungsgemäßes Rotorblatt, das mit einem unter Unterdruck stehenden Gas befüllt ist,
Fig. 3
einen Querschnitt eines erfindungsgemäßen Rotorblattes, das mit unter einem Überdruck stehenden Gas befüllt ist.
Further features of the present invention will become apparent from the appended claims, the following description of a preferred embodiment and from the accompanying drawings. Show:
Fig. 1
a side view of the wind turbine with inventive rotor blade,
Fig. 2
a cross section through an inventive rotor blade, which is filled with a negative pressure gas,
Fig. 3
a cross section of a rotor blade according to the invention, which is filled with pressurized gas gas.

In der Fig. 1 ist eine Windenergieanlage 10 dargestellt, die am oberen Ende eines vertikalen, auf einem horizontalen Untergrund 12 angeordneten Turms 14 eine auf der Turmoberseite angeordnete Gondel 16 aufweist. Wie der Fachmann des Standes der Technik weiß, sind für die genaue Ausbildung eines Turms einer Windenergieanlage vielfältige Ausführungsformen denkbar. Die Erfindung ist naturgemäß nicht auf die in der Zeichnung beschriebene, kegelstumpfförmige Form des Turms 14 beschränkt.In the Fig. 1 a wind energy plant 10 is shown, which has at the upper end of a vertical, arranged on a horizontal surface 12 tower 14 a arranged on the tower top nacelle 16. As is well known to those skilled in the art, the exact design of a tower of a wind turbine is diverse Embodiments conceivable. The invention is not limited to the nature described in the drawing, frusto-conical shape of the tower 14.

An einem windzugewandten Ende der Gondel 16 ist ein Rotor 18 angeordnet, der eine Nabe 20 aufweist. Mit der Nabe 20 verbunden sind drei Rotorblätter 22, wobei die Rotorblattwurzeln der Rotorblätter 22 in entsprechende Öffnungen der Nabe 20 eingesteckt und in bekannter Weise mit dieser verbunden sind.At a windward end of the nacelle 16, a rotor 18 is arranged, which has a hub 20. Connected to the hub 20 are three rotor blades 22, wherein the rotor blade roots of the rotor blades 22 are inserted into corresponding openings of the hub 20 and connected in a known manner with this.

Der Rotor 18 dreht sich um eine leicht gegenüber der Horizontalen nach oben geneigte Achse. Sobald Wind auf die Rotorblätter 22 trifft, wird der Rotor 18 mitsamt Rotorblättern 22 um die Rotorachse in Rotation versetzt. Die Bewegung der Rotorachse wird von einem innerhalb der Gondel angeordneten Generator in elektrischen Strom umgewandelt. Die Rotorblätter 22 überstreichen während der Rotation eine Kreisfläche. Über eine nicht dargestellte, allerdings den Fachleuten des Standes der Technik bekannte, Verstelleinrichtung können die Rotorblätter 22 einzeln in ihrer Stellung zum Wind verändert werden, das heißt, der Anstellwinkel der Rotorblätter 22 zum Wind ist einstellbar.The rotor 18 rotates about an axis slightly inclined relative to the horizontal. As soon as wind hits the rotor blades 22, the rotor 18 together with the rotor blades 22 is set in rotation about the rotor axis. The movement of the rotor axis is converted into electrical current by a generator arranged inside the nacelle. The rotor blades 22 sweep a circular area during rotation. About an unillustrated, but known to those skilled in the art, adjusting the rotor blades 22 can be changed individually in their position relative to the wind, that is, the angle of attack of the rotor blades 22 to the wind is adjustable.

Der grundsätzliche Aufbau der Windenergieanlage 10 mit zumindest annähernd horizontaler Rotorachse ist im Stand der Technik bekannt, so dass auf eine detaillierte Darstellung derselben verzichtet wird.The basic structure of the wind power plant 10 with at least approximately horizontal rotor axis is known in the prior art, so that is dispensed with a detailed illustration of the same.

Jedes Rotorblatt 22 besteht aus einer insbesondere in den Fig. 2 und 3 zu erkennenden Unterschale 24 sowie einer Oberschale 26, die in Längsrichtung des Rotorblattes 22 miteinander verbunden sind. Die Materialien der Unterschale 24 und der Oberschale 26 sowie die Verbindungen derselben sind derart ausgebildet, dass der im Inneren des Rotorblattes 22, das heißt, der von der Unterschale 24 und der Oberschale 26 umschlossene Hohlraum 28, gasdicht, insbesondere luftdicht von der Umgebungsluft abgeschlossen ist.Each rotor blade 22 consists of a particular in the FIGS. 2 and 3 to be recognized lower shell 24 and an upper shell 26, which are connected to each other in the longitudinal direction of the rotor blade 22. The materials of the lower shell 24 and the upper shell 26 and the compounds thereof are formed such that in the interior of the rotor blade 22, that is, of the lower shell 24 and the upper shell 26 enclosed cavity 28, gas-tight, in particular airtight is closed by the ambient air ,

Die Rotorblätter 22, also die jeweiligen Hohlräume 28, sind mit einem Gas, nämlich Luft befüllt. Dabei kann im jeweiligen Hohlraum 18 grundsätzlich entweder Unterdruck herrschen oder Überdruck, um den erfindungsgemäßen Erfolg zu bewirken:The rotor blades 22, so the respective cavities 28, are filled with a gas, namely air. In principle, either negative pressure or excess pressure prevail in the respective cavity 18 in order to bring about the success of the invention:

Im Rotorblatt 22 der Figur 2 herrscht im Vergleich zu dem mittleren Luftdruck am Einsatzort der Windenergieanlage 10 ein Unterdruck, so dass sich aufgrund des außen herrschenden, größeren Luftdruckes Kräfte in Richtung des Inneren des Rotorblattes 22 ergeben, wie dies durch die nach innen gerichteten Pfeile angedeutet ist. Es wird eine Vorspannung des Rotorblattes 22 erzeugt. Die dargestellten Kräfte führen insbesondere auch zu definierten Druckbelastungen von im Inneren angeordneten, die Unterschale 24 und die Oberschale 26 verbindenden Stegen 30. Die definierte Druckbelastung ist durch die Einstellung des Unterdruckes so gewählt, dass die Druckkräfte insbesondere auf die Stege 30 größer sind als im Betrieb der Windenergieanlage 10 auftretende, durch äußere Einflüsse auf die Stege 30 einwirkende Zugkräfte. Dadurch werden die im Betrieb auftretenden Zugkräfte aufgehoben bzw. sogar überkompensiert, d.h. überdrückt. Insgesamt erfährt das Rotorblatt 22 während des Betriebs demnach ausschließlich Druckbelastungen, so dass besonders schädliche Wechsellasten vermieden werden.In the rotor blade 22 of FIG. 2 There is a negative pressure compared to the mean air pressure at the site of the wind turbine 10, so that due to the prevailing, greater air pressure forces in the direction of the interior of the rotor blade 22 result, as indicated by the inwardly directed arrows. A bias of the rotor blade 22 is generated. The forces shown lead in particular also to defined pressure loads arranged in the interior, the lower shell 24 and the upper shell 26 connecting webs 30. The defined pressure load is selected by adjusting the negative pressure so that the pressure forces are greater in particular on the webs 30 as occurring during operation of the wind turbine 10, by external influences on the webs 30 acting tensile forces. As a result, the tensile forces occurring during operation are canceled or even overcompensated, that is suppressed. Overall, the rotor blade 22 experiences during operation therefore exclusively pressure loads, so that particularly harmful alternating loads are avoided.

Im Rotorblatt 22 der Fig. 3 herrscht im Vergleich zu dem mittleren Luftdruck am Einsatzort der Windenergieanlage 10 Überdruck. Druckbelastungen insbesondere der Stege 30 des Rotorblattes 22 werden vermieden, wenn der Überdruck im Hohlraum 28 ausreichend groß gewählt ist. Durch den Überdruck und der damit einhergehenden Vorspannung des Rotorblattes 22 wirken auf die Stege 30 definierte Zugkräfte. Diese definierten Zugkräfte kompensieren oder überkompensieren die im Betrieb auftretenden, äußeren Druckkräfte, sodass das Rotorblatt 22 insgesamt nur Zugbelastungen erfährt. Schädliche Wechsellasten, d.h. Wechsel zwischen Zug- und Druckbelastungen, werden vermieden.In the rotor blade 22 of Fig. 3 There is 10 overpressure compared to the average air pressure at the site of the wind turbine. Pressure loads, in particular of the webs 30 of the rotor blade 22 are avoided when the pressure in the cavity 28 is chosen to be sufficiently large. Due to the overpressure and the associated bias of the rotor blade 22 act on the webs 30 defined tensile forces. These defined tensile forces compensate or overcompensate the external compressive forces that occur during operation, so that the rotor blade 22 experiences only tensile loads as a whole. Harmful alternating loads, ie changes between tensile and compressive loads, are avoided.

Im Weiteren wird die Windenergieanlage 10 der Figur 1 mit einem Rotorblatt 22 beschrieben, in dem entsprechend Fig. 3 Überdruck herrscht bzw. erzeugt wird.In addition, the wind turbine 10 of the FIG. 1 with a rotor blade 22 described in the corresponding Fig. 3 Overpressure prevails or is generated.

Im Inneren der Gondel 16 ist dazu eine nicht dargestellte Druckluftquelle, nämlich ein Kompressor, angeordnet. Über nicht dargestellte Leitungen ist der Kompressor mit jedem Rotorblatt 22 verbunden. Dazu weist jedes Rotorblatt 22 im Bereich der Wurzel eine Einlass- und eine Auslassöffnung auf. Die jeweilige Einlassöffnung ist mit dem Kompressor über entsprechende Leitungen verbunden, die jeweilige Auslassöffnung ist über ein steuerbares Ventil und entsprechende Leitungen mit der Umgebungsluft verbunden.Inside the nacelle 16 is a compressed air source, not shown, namely, a compressor arranged. Via unillustrated lines, the compressor is connected to each rotor blade 22. For this purpose, each rotor blade 22 has an inlet and an outlet opening in the region of the root. The respective inlet opening is connected to the compressor via corresponding lines, the respective outlet opening is connected via a controllable valve and corresponding lines with the ambient air.

Mithilfe des Kompressors kann jedes Rotorblatt 22 separat mit Druckluft befüllt werden, bis ein Überdruck vorliegt. Die Erzeugung von Überdruck in dem Rotorblatt 22 muss daher nicht bei Herstellung des Rotorblattes 22 erfolgen, sondem kann vorgenommen werden, wenn dieses bereits in die Windenergieanlage 10 integriert ist. Die über ein Ventil steuerbare Auslassöffnung ermöglicht es, einen Druckausgleich mit der Umgebungsluft zu schaffen, d.h., eine Druckemiedrigung. Im Ergebnis kann damit der Druck innerhalb des Rotorblattes 22 auf eine gewünschte Größe reduziert werden, wobei der unterste mögliche Wert dem Luftdruck der Umgebung entspricht.Using the compressor, each rotor blade 22 can be filled separately with compressed air until an overpressure exists. The generation of overpressure in the rotor blade 22 therefore does not have to take place during production of the rotor blade 22, but may be carried out if this is already integrated into the wind energy plant 10. The controllable via a valve outlet opening makes it possible to create a pressure equalization with the ambient air, ie, a pressure reduction. As a result, the pressure inside the rotor blade 22 can be reduced to a desired size, the lowest possible value corresponding to the ambient air pressure.

Innerhalb des Rotorblattes 22 sind jeweils Sensoren angeordnet, die die Luftfeuchtigkeit, die Temperatur sowie den Druck innerhalb des Hohlraums 28 messen.Within the rotor blade 22 each sensors are arranged, which measure the humidity, the temperature and the pressure within the cavity 28.

Sobald aufgrund von äußeren Temperaturschwankungen der gemessene Ist-Druck in dem Hohlraum 28 unter einen vorbestimmten Minimalwert fällt, wird mittels einer entsprechenden Regelungseinrichtung der Kompressor eingeschaltet und der Druck innerhalb des betreffenden Rotorblattes 22 bis zu einem vorbestimmten Soll-Wert erhöht. Sollte der Ist-Druck in dem Hohlraum 28 aufgrund hoher Außentemperaturen im Bereich der Windenergieanlage 10 über einen vorbestimmten Maximalwert ansteigen, kann das Auslassventil geöffnet werden, so dass aus dem Hohlraum 28 Druckluft austreten kann, bis eine Erniedrigung des Drucks auf den vorbestimmten Soll-Wert erfolgt ist.As soon as due to external temperature fluctuations, the measured actual pressure in the cavity 28 falls below a predetermined minimum value, the compressor is turned on by means of a corresponding control device and the pressure within the rotor blade 22 in question increases to a predetermined desired value. If the actual pressure in the cavity 28 rises above a predetermined maximum value due to high outside temperatures in the area of the wind turbine 10, the outlet valve can be opened so that compressed air can escape from the cavity 28 until a decrease of the pressure to the predetermined desired value is done.

Wenn der Feuchtigkeitssensor einen Ist-Wert misst, der oberhalb eines durch die Regelungseinrichtung vorgegebenen Soll-Wertes liegt, kann die Luft im Inneren des Rotorblattes 22 mittels des Kompressors und den Ein- und Auslassöffnungen durch trockenere Luft ersetzt werden.If the humidity sensor measures an actual value which is above a desired value preset by the control device, the air inside the rotor blade 22 can be replaced by drier air by means of the compressor and the inlet and outlet openings.

Für die einzelnen Regelungsverfahren gibt es eine Vielzahl von Möglichkeiten, wie der Fachmann des Standes der Technik erkennt.There are a variety of possibilities for the individual control methods, as the person skilled in the art recognizes.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

1010
WindenergieanlageWind turbine
1212
Untergrundunderground
1414
Turmtower
1616
Gondelgondola
1818
Rotorrotor
2020
Nabehub
2222
Rotorblattrotor blade
2424
Unterschalesubshell
2626
OberschaleUpper shell
2828
Hohlraumcavity
3030
Stegweb

Claims (12)

  1. Rotor blade for a wind energy installation, with the rotor blade being configured as a hollow body with an upper shell and a lower shell which delimit a cavity, characterized by the following features:
    (a) the cavity (28) is sealed to be gas-tight and is filled with gas, in particular air, whose pressure is greater than or less than the average air pressure to be expected at the point of use of the rotor blade (22),
    (b) filling the cavity with gas generates a prestressing of the rotor blade which counteracts external forces acting thereon.
  2. Rotor blade according to claim 1, characterized in that one or more inlet and/or outlet openings is or are arranged in one or more walls (24, 26) which bound the cavity (28), via which the gas can be introduced from the outside into the cavity (28), and/or via which the gas can be passed to the outside from the cavity (28).
  3. Rotor blade according to claim 1 or 2, characterized in that the rotor blade (22) has valves via which the gas inlet and/or outlet into or from the cavity (28) can be controlled.
  4. Rotor blade according to one or more of the preceding claims, characterized in that the inlet and/or outlet opening are/is arranged in the area of the rotor blade root.
  5. Rotor blade according to one or more of the preceding claims, characterized in that the rotor blade (22) has a lower shell (24) and an upper shell (26) with lateral webs (30) running between them.
  6. Rotor blade according to one or more of the preceding claims, characterized in that the rotor blade (22) has a pressure sensor, by means of which the pressure within the cavity (28) can be measured.
  7. Rotor blade according to one or more of the preceding claims, characterized in that the rotor blade (22) has a humidity sensor, by means of which the humidity within the cavity (28) can be measured.
  8. Rotor blade according to one or more of the preceding claims, characterized in that the rotor blade (22) has a temperature sensor, by means of which the temperature within the cavity (28) can be measured.
  9. Wind energy installation having a rotor (18) which can be driven by wind and has at least one rotor blade (22) according to one or more of the preceding claims, having a generator for conversion of the mechanical energy of the rotor (18) to electrical energy, and having a tower (14) on which the rotor (18) is arranged.
  10. Wind energy installation according to Claim 9, characterized in that the wind energy installation (10) has a pressure source and/or a vacuum-pressure source, which is connected via lines to the cavity (28) of the rotor blade (22).
  11. Wind energy installation according to Claim 9 or 10, characterized in that the wind energy installation (10) has a closed-loop control device, via which the pressure source and/or the vacuum-pressure source can be controlled as a function of the actual pressure and/or the actual humidity and/or the actual temperature of the gas within the cavity (28).
  12. Method for operation of a wind energy installation having a rotor (18) which can be driven by wind and has at least one rotor blade (22) according to one or more of the preceding claims 1-8, having a generator for conversion of the mechanical energy of the rotor (18) to electrical energy, and having a tower (14) on which the rotor (18) is arranged, wherein the rotor blade is configured as a hollow body with an upper shell and a lower shell which delimit a cavity, wherein the cavity (28) is sealed to be gas-tight and is filled with gas, in particular air, whose pressure is greater than or less than the average air pressure to be expected at the point of use of the rotor blade (22), wherein the filling of the cavity with gas generates a prestressing of the rotor blade which counteracts external forces acting thereon, wherein the actual pressure of the gas which generates the prestressing and which is located in the cavity, and/or its actual humidity and/or its actual temperature is/are measured, and wherein the pressure within the cavity (28) is increased or decreased and/or the gas within the cavity (28) is at least partially, but preferably completely, replaced as a function of the actual pressure and/or the actual humidity and/or the actual temperature.
EP06021603.3A 2005-11-14 2006-10-16 Blade for a wind turbine Not-in-force EP1785621B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005054594A DE102005054594A1 (en) 2005-11-14 2005-11-14 Rotor blade for a wind energy plant

Publications (3)

Publication Number Publication Date
EP1785621A2 EP1785621A2 (en) 2007-05-16
EP1785621A3 EP1785621A3 (en) 2012-10-17
EP1785621B1 true EP1785621B1 (en) 2014-01-01

Family

ID=37193994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06021603.3A Not-in-force EP1785621B1 (en) 2005-11-14 2006-10-16 Blade for a wind turbine

Country Status (5)

Country Link
US (1) US7726943B2 (en)
EP (1) EP1785621B1 (en)
AU (1) AU2006236033A1 (en)
CA (1) CA2566371C (en)
DE (1) DE102005054594A1 (en)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2828619C (en) * 2004-05-05 2018-09-25 Direct Flow Medical, Inc. Prosthetic valve with an elastic stent and a sealing structure
CA2610669A1 (en) 2005-06-07 2006-12-14 Direct Flow Medical, Inc. Stentless aortic valve replacement with high radial strength
US7517198B2 (en) * 2006-03-20 2009-04-14 Modular Wind Energy, Inc. Lightweight composite truss wind turbine blade
JP4699255B2 (en) * 2006-03-24 2011-06-08 三菱重工業株式会社 Windmill wing
US7935144B2 (en) 2006-10-19 2011-05-03 Direct Flow Medical, Inc. Profile reduction of valve implant
US8133213B2 (en) 2006-10-19 2012-03-13 Direct Flow Medical, Inc. Catheter guidance through a calcified aortic valve
US8454318B2 (en) 2006-12-15 2013-06-04 Bladena Aps Reinforced aerodynamic profile
ES2496167T3 (en) 2007-01-16 2014-09-18 Bladena Aps Reinforced wind turbine blade
DK2108083T3 (en) 2007-01-25 2013-02-04 Bladena Aps Reinforced wind turbine blade
CN101595300A (en) * 2007-01-29 2009-12-02 丹麦技术大学 Wind turbine blade
DE102007020423A1 (en) * 2007-04-27 2008-10-30 Daubner & Stommel GbR Bau-Werk-Planung (vertretungsberechtigter Gesellschafter: Matthias Stommel, 27777 Ganderkesee) Method for operating a wind turbine and wind turbine
EP2190379B1 (en) 2007-08-23 2016-06-15 Direct Flow Medical, Inc. Translumenally implantable heart valve with formed in place support
CN102066747A (en) * 2008-06-23 2011-05-18 丹麦技术大学 A wind turbine blade with angled girders
ES2383061T3 (en) 2008-06-24 2012-06-18 Bladena Aps Reinforced Wind Turbine Paddle
GB2466433B (en) * 2008-12-16 2011-05-25 Vestas Wind Sys As Turbulence sensor and blade condition sensor system
US7938623B2 (en) * 2009-03-26 2011-05-10 General Electric Company Inflatable wind turbine blade and method for forming said rotor blade
US8753091B1 (en) 2009-05-20 2014-06-17 A&P Technology, Inc. Composite wind turbine blade and method for manufacturing same
GB2472437A (en) 2009-08-06 2011-02-09 Vestas Wind Sys As Wind turbine rotor blade control based on detecting turbulence
EP2330294B1 (en) 2009-12-02 2013-01-16 Bladena ApS Reinforced airfoil shaped body
DE202010000323U1 (en) * 2010-03-05 2011-06-22 Lätzsch GmbH Kunststoffverarbeitung, 04567 Wind wing for a flow energy plant
US8262362B2 (en) 2011-06-08 2012-09-11 General Electric Company Wind turbine blade shear web with spring flanges
US8257048B2 (en) 2011-07-19 2012-09-04 General Electric Company Wind turbine blade multi-component shear web with intermediate connection assembly
US8235671B2 (en) 2011-07-19 2012-08-07 General Electric Company Wind turbine blade shear web connection assembly
US8393871B2 (en) * 2011-07-19 2013-03-12 General Electric Company Wind turbine blade shear web connection assembly
US9702339B2 (en) 2011-11-01 2017-07-11 General Electric Company Wind turbine blades with cap-assisted bond configuration and associated bonding method
US9458823B2 (en) 2011-12-12 2016-10-04 General Electric Company Wind turbine blade shear web connection assembly
CN103034271B (en) * 2013-01-15 2016-03-16 天津工业大学 The anti-anti-accumulated ice electric controller that congeals of blade of wind-driven generator
US9745954B2 (en) 2014-04-30 2017-08-29 General Electric Company Rotor blade joint assembly with multi-component shear web
EP3037344B1 (en) * 2014-12-23 2017-12-06 Airbus Operations, S.L. A propeller blade for an aircraft engine
US11065840B2 (en) * 2015-02-25 2021-07-20 Biomerenewables Inc. Structures and methods of manufacturing structures using biological based materials
CN109641408A (en) * 2016-06-28 2019-04-16 维斯塔斯风力系统有限公司 The manufacturing method of wind turbine blade
US10519927B2 (en) 2017-02-20 2019-12-31 General Electric Company Shear web for a wind turbine rotor blade
US10570879B2 (en) 2017-05-23 2020-02-25 General Electric Company Joint assembly for a wind turbine rotor blade with flanged bushings
US10563636B2 (en) 2017-08-07 2020-02-18 General Electric Company Joint assembly for a wind turbine rotor blade
CN114412700A (en) * 2022-03-09 2022-04-29 广州微体科技有限公司 High-rigidity inflatable wind driven generator blade

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932470A (en) * 1955-05-24 1960-04-12 Chance Vought Aircraft Inc Variable contour airfoil
US3129908A (en) * 1961-08-25 1964-04-21 Richard G Harper Device for selectively altering lift characteristics of an airfoil
US3604666A (en) * 1969-08-25 1971-09-14 Goodrich Co B F Pneumatic deicer
US3623684A (en) * 1970-02-18 1971-11-30 Goodyear Tire & Rubber Deicing device
DK387882A (en) * 1982-02-01 1983-08-02 Stanford Res Inst Int WIND TURBIN ROTOR SHEET AND PROCEDURE FOR PREPARING THE SAME
US4561613A (en) * 1983-05-09 1985-12-31 The B. F. Goodrich Company Deicer for aircraft
US4494715A (en) * 1983-05-09 1985-01-22 The B. F. Goodrich Company Deicer
US4779823A (en) * 1984-12-03 1988-10-25 The B. F. Goodrich Company Pneumatic deicer
DE3913505A1 (en) * 1989-04-25 1989-11-16 Astrid Holzem WING WITH AERODYNAMIC BRAKE FOR WIND ENGINES
US5449133A (en) * 1993-07-30 1995-09-12 The B. F. Goodrich Company Pneumatic de-icer having improved aerodynamic characteristics
DE19528862A1 (en) * 1995-08-05 1997-02-06 Aloys Wobben Process for de-icing a rotor blade of a wind turbine and rotor blade suitable for carrying out the process
DE19719221C1 (en) * 1997-05-07 1998-10-29 Roland Stelzer Rotor blade for wind generator
US6398501B1 (en) * 1999-09-17 2002-06-04 General Electric Company Apparatus for reducing thermal stress in turbine airfoils
DE10152449A1 (en) * 2001-10-26 2003-05-15 Aloys Wobben Rotor blade for wind turbine is fitted with system for altering its surface, e.g. pivoting flap or section of rotor which can be wound up on to core
DE10233102B4 (en) * 2002-06-21 2006-02-16 Intema Industrietextilverarbeitung Gmbh Rotor blade for wind turbines
US6940185B2 (en) * 2003-04-10 2005-09-06 Advantek Llc Advanced aerodynamic control system for a high output wind turbine
DE10337708A1 (en) * 2003-08-16 2005-03-10 Josef Gail Wind turbine rotor blade for wind-powered energy plant provided by material envelope stretched over outside of support framework
US7086834B2 (en) * 2004-06-10 2006-08-08 General Electric Company Methods and apparatus for rotor blade ice detection

Also Published As

Publication number Publication date
AU2006236033A1 (en) 2007-05-31
EP1785621A3 (en) 2012-10-17
US7726943B2 (en) 2010-06-01
CA2566371C (en) 2011-01-18
DE102005054594A1 (en) 2007-05-16
EP1785621A2 (en) 2007-05-16
US20070110584A1 (en) 2007-05-17
CA2566371A1 (en) 2007-05-14

Similar Documents

Publication Publication Date Title
EP1785621B1 (en) Blade for a wind turbine
EP2273101B1 (en) Assembly process for rotorblades of a wind turbine
EP3330530B1 (en) Wind turbine blade
EP2542776B1 (en) Wave power plant according to the principle of the oscillating water column
DE102005045516A1 (en) Method for adapting a wind turbine to given wind conditions
DE19719221C1 (en) Rotor blade for wind generator
EP2909473A1 (en) Wind turbine
EP2948596A1 (en) Hydraulic power plant
EP2984338A1 (en) Rotor blade of a wind turbine
DE102018113531A1 (en) A method of operating a wind turbine and means for controlling and / or regulating a wind turbine and wind turbine with a rotor and a generator driven via the rotor
EP2140136B1 (en) Wind power plant
DE102006020257A1 (en) Method for operating a wind energy plant
DE3009922A1 (en) Wind power generating station with servo control of blades - uses measuring instrument of safety monitoring system producing pulses processed electronically
DE102009007812B4 (en) Wind turbine with wind-slip profiling
WO2014090219A2 (en) Rotor blade, retaining arm and rotor for a vertical-axis wind turbine, and production method and vertical-axis wind turbine
DE202005018937U1 (en) Solar wind boom has solar cells attached to outer surface of each blade of rotor rotatable about vertical axle
DE102012107250B4 (en) Rotor of a vertical axis wind turbine
DE102009026595B4 (en) Wind turbine with an axis of rotation substantially perpendicular to the wind direction
DE202010016041U1 (en) Wind turbine and wind farm
DE102011014009B4 (en) Tower wind turbine with a vertical axis of rotation, equipped with a combined wing construction, consisting of resistance wings and vertically mounted buoyancy wings, wherein a wind tunnel effect generated in tiers on the tower is used to deflect a kinetic wind energy
DE102010016086A1 (en) Rotor blade for H rotor
DE102015110981A1 (en) Wind energy plant for the production of electrical energy from wind and corresponding tower
EP2249028B1 (en) Fluid flow power plant
WO2016162350A1 (en) Wind turbine rotor blade
DE102014216685A1 (en) Twistable rotor blade

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

RIC1 Information provided on ipc code assigned before grant

Ipc: F03D 1/06 20060101AFI20120912BHEP

17P Request for examination filed

Effective date: 20130416

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20130802

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 647722

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140215

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502006013469

Country of ref document: DE

Effective date: 20140220

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20140101

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140502

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502006013469

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

26N No opposition filed

Effective date: 20141002

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502006013469

Country of ref document: DE

Effective date: 20141002

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20141030

Year of fee payment: 9

Ref country code: FR

Payment date: 20141008

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141016

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20141016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141031

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141031

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141016

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141016

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 647722

Country of ref document: AT

Kind code of ref document: T

Effective date: 20141016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141016

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502006013469

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140402

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160503

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140101

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20061016

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151102